The formula for the axis of symmetry of a quadratic equation in standard form is x
=
−
b
2
a
. Which formula can be used to determine b, given x and a?
A. b=2ax

B. b= x/ax

C.
b=-2ax
D.
b= -2a/x

1. x> -5

2. x< 8

step-by-step explanation:

1. 2x> -10

divide by 2 from both sides of equation.

2x/2> -10/2

simplify, to find the answer.

-10/2=-5

x> -5 is the correct answer.

2. 3x< 24

divide by 3 from both sides of equation.

3x/3< 24/3

simplify, to find the answer.

24/3=8

x< 8 is the correct answer.

i hope this you, and have a wonderful day!

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two

answer is c

step-by-step explanation:

81/12=324/x

x=48